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    <h2>运算符</h2>
    <p>运算符是指程序设计语言中有运算意义的符号，类似于普通数学里运算符。</p>
    <h2>运算符分类</h2>
    <ul>
        <li>赋值运算符</li>
        <li>一元运算符</li>
        <li>算数运算符（二元运算符）</li>
        <li>逻辑运算符</li>
        <li>比较运算符</li>
        <li>三元运算符</li>
    </ul>
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